Which type of transformer winding typically has a lower resistance?

The low voltage winding of a transformer typically has a lower resistance due to several factors. Low voltage windings are usually made with thicker wire compared to high voltage windings. This is necessary because they must carry higher current to deliver the same amount of power at a lower voltage, according to the relationship that power equals voltage multiplied by current (P = V x I). Thicker wires have a lower resistance, which helps minimize power losses due to heat in the winding.

In contrast, high voltage windings are generally constructed using thinner wire to reduce weight and material costs, which results in a higher resistance. This is acceptable since high voltage windings operate at lower currents.

The statement that all windings have the same resistance is inaccurate because their design, intended use, and required gauge will vary based on whether they are intended for high or low voltage applications.

The option regarding reliance on wire gauge is somewhat relevant, as the choice of gauge does influence resistance. However, the context of transformer design clearly indicates that low voltage windings are specifically designed to have a lower resistance, reinforcing why selecting low voltage windings is the accurate choice.